<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="rolesList" border stripe row-key="id">
        <el-table-column type="expand">
          <template slot-scope="{ row }">
            <el-row
              :class="['bdbottom', 'vcenter', index === 0 ? 'bdtop' : '']"
              v-for="(item1, index) in row.children"
              :key="item1.id"
            >
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(row, item1.id)">
                  {{ item1.authName }}</el-tag
                ><i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二、三级权限 -->
              <el-col :span="19">
                <!-- 循环渲染二级菜单 -->
                <el-row
                  v-for="(item2, index) in item1.children"
                  :key="item2.id"
                  :class="['vcenter', index !== 0 ? 'bdtop' : '']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(row, item2.id)"
                    >
                      {{ item2.authName }}</el-tag
                    ><i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      closable
                      @close="removeRightById(row, item3.id)"
                      v-for="(item3, index) in item2.children"
                      :key="item3.id"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"> </el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="{ row, $index }">
            <el-button type="primary" icon="el-icon-edit" size="mini"
              >编辑</el-button
            ><el-button type="danger" icon="el-icon-delete" size="mini"
              >删除</el-button
            ><el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 数形控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        default-expand-all
        node-key="id"
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "Roles",
  props: [],
  data() {
    return {
      rolesList: [],
      //控制分配权限对话框的显示和隐藏
      setRightDialogVisible: false,
      //所有权限的数据
      rightsList: [],
      //树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      //默认选中的节点id 值
      defKeys: [],
      //弹出修改对话框是保存选中的id
      roleId: "",
    };
  },
  methods: {
    //获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");

      if (res.meta.status !== 200)
        return this.$message.error("获取角色列表失败");
      this.rolesList = res.data;
    },
    //根据id删除权限
    async removeRightById(role, rightId) {
      //弹框提示删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm")
        return this.$message.info("取消了删除！");

      //删除请求 roles/:roleId/rights/:rightId delete
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) return this.$message.error("删除权限失败！");
      this.$message.success("删除成功！");
      role.children = res.data;
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
      //当前即将分配角色的id
      this.roleId = role.id;
      //获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) return this.$message.error("获取权限失败");
      this.rightsList = res.data;
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    //通过递归，获取三级权限的id
    getLeafKeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    //监听分配权限对话框的关闭，置空默认权限分配数组
    setRightDialogClosed() {
      this.defKeys = [];
      this.roleId = "";
    },
    //点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];
      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      );
      if (res.meta.status !== 200) return this.$message.error("分配权限失败");
      this.$message.success("分配权限成功");
      this.getRolesList();
      this.setRightDialogVisible = false;
    },
  },
  created() {
    this.getRolesList();
  },
  mounted() {},
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>